Sloane Stephens in match play at the 2013 Australian Open Grand Slam tennis tournament. The teenager defeated Grand Slam champion Serena Williams Stock Photo - Alamy
Sloane Stephens Shifts From Under Armour To Nike | SGB Media Online
Sloane Stephens' Rise Provides Boost For Under Armour's Tennis Marketing Potential
At home and abroad, tennis helps Under Armour take center court